The DishTv HD box will ask for formatting before it can record contents on HDD. I'm Not sure about the format though.
However, contents will not play on computer, to reuse HDD on computer/media players it has to be formatted again in one of the widely recognized formats FAT32, NTFS etc.
On another note, DishTv is one of the costliest in terms of package pricing in the market. I had a long argument with them to restore some sanity and basic sense of pricing in them.
I've subscribed to 5 year topmost package of Dishtv. Sometime after 5 months into the subscription period they removed bunch of HD channels from my package, citing price increase as a reason ! I tried reasoning with them on basic principle of providing price protection against any cost fluctuation for advance payment subscribers.
Numerous phone calls, emails and social media communication did not seem to yield any positive result for 2 months. Their standard reply was seniors in their marketing department decides these matters so we can not help !! How absurd?
Finally I had enough of it and decided to reach to them via :: Grievance Redress Mechanism in Government ::
Must say its a very powerful and excellent initiative by government, it seems the complaints are handled directly by Secretaries of respective Ministry. I lodged a complaint under Information & Broadcasting ministry.
Within 2 weeks of lodging the complaint, blocked channels were restored in my package
A big thumbs down to Dishtv and thumbs up to this nice initiative and opening up online avenue to hear common man's grievances.